go.image/tiff: initial support for writing TIFF images

The basic functionality works. Features to add in future CLs:

- compression
- fast paths for image formats that can be directly expressed in TIFF,
  such as RGBA, NRGBA and maybe Gray and Paletted.

R=nigeltao
CC=golang-dev
https://golang.org/cl/5694051
3 files changed
tree: 294157d4ab0ea6a1939b8333c05312a6e5e9793f
  1. bmp/
  2. testdata/
  3. tiff/
  4. .hgignore
  5. AUTHORS
  6. codereview.cfg
  7. CONTRIBUTORS
  8. README